Alcatel-Lucent 9500 MXC User Manual page 85

3DB 23063 ADAA - Rev 004 July 2007
• Protection is provided for all 40/32 tribs for a path / ODU failure. Each IDU
normally takes its Rx data from its directly connected ODU. For a path/ODU
failure, data is restored from its partner ODU/IDU via the IDU-IDU
expansion cable.
Switching on a failed path is not hitless; the 20/16 tribs assigned on the
failed path are restored from the remaining path (via the expansion cable)
within 200 ms, the 20/16 tribs assigned on remaining path are not affected.
• Protection is not provided for all 40/32 tribs for a tributary module or PSU
equipment failure. Tribs terminated on the failed IDU (20/16 tribs) will be
lost; tribs terminated on the partner IDU will not be affected, providing the
recommended (default) protection configuration is used where each IDU is
taking Rx data from its directly connected ODU.
• For more information on protected operation, refer to Additional Procedures
for IDU 300 20xV2, Volume 1V, Chapter 8.
• A license is required for 40xE1 or 32xDS1 operation, one license per
terminal. (The base capacity maximums of 20xE1 or 16xDS1 do not require
a license). For more information, refer to Volume IV, Chapter 4.
Protected operation between IDUs and an INU is not supported. Where protected
IDUs are to be used, they must be at both ends of the link.
Protected IDU Terminal
Figure 2-14.
Protection cable
Balanced trib 'Y' cable assembly
100/120 ohm balanced trib
cable extension options:
- RJ-45 to RJ-45 crossover
- RJ-45 to RJ-45 straight
- RJ-45 to wire-wrap
Equal or unequal couplers are available for single antenna operation:
• Equal has a nominal 3.5/3.5 dB insertion loss split, and is recommended for
protected IDU operation.
• Unequal has a nominal 1.6/6.4 dB loss split.
9500 MXC User Manual
NMS interconnection cable
Tx Rx
75 ohm unbalanced
RJ-45 to BNC female
trib 'Y' cable assembly
Vol. II-2-29